# Connect ChatGPT

Add Fundalyze to ChatGPT as a custom MCP connector and sign in with your Fundalyze account, or import the REST API into a custom GPT.

ChatGPT can use Fundalyze in two ways: as a **connector** (the MCP server, signed in with OAuth) inside ChatGPT's chats, or as **actions** in a custom GPT you build, which call the REST API with your key.

## Connector (MCP, OAuth sign-in)

### Before you start

- A Fundalyze plan or free trial, and your Fundalyze sign-in.
- A ChatGPT plan that offers custom connectors, which ChatGPT currently provides through **developer mode**. On a workspace plan, an admin may need to allow it first.

### 1. Turn on developer mode

In ChatGPT, open **Settings**, then the section for apps and connectors, and turn on **developer mode** (often under an "Advanced" heading). The exact menu names may differ, and OpenAI changes them from time to time.

### 2. Create the connector

Choose to create a new connector (or app) and fill in:

| Field | Value |
|---|---|
| Name | `Fundalyze` |
| Description | `SEC fundamentals, filings, trades and U.S. economic data for US-listed companies` |
| MCP server URL | `https://api.fundalyze.ai/mcp` |
| Authentication | OAuth |

Leave any client ID and secret fields empty: ChatGPT registers itself with Fundalyze automatically. Confirm that you trust the server, then create it.

### 3. Sign in and allow

ChatGPT opens Fundalyze's sign-in page at `app.fundalyze.ai`. Sign in if asked, check that the page says **"ChatGPT wants read access to your Fundalyze data"** (the name is whatever ChatGPT registered as), and choose **Allow**. You land back in ChatGPT with the connector connected.

### 4. Use it

In a new chat, add the Fundalyze connector from the tools menu under the message box (in developer mode it may be listed under the developer-mode option), then ask:

- "Use Fundalyze to compare the operating margins of Microsoft, Alphabet and Meta over five years."
- "List Apple's last five 10-K filings with links."
- "What did FRED's latest payrolls figure show?"

All Fundalyze tools are marked read-only, so ChatGPT should not ask you to confirm each call as it does for tools that change things.

Disconnect any time from ChatGPT's settings, or on our side under [Account → API & MCP](/account/api) → **Connected apps**. The connection has its own 2,000 calls a day, separate from your API keys.

## Custom GPT (REST actions, API key)

If you build a custom GPT, you can give it the REST API as actions instead:

1. In the GPT editor, add an action and import the schema from this URL:

   ```text title="OpenAPI schema URL"
   https://api.fundalyze.ai/api/public/v1/openapi.json
   ```

2. Set authentication to **API key**, auth type **Bearer**, and paste a key from [Account → API & MCP](/account/api).

The key is yours: anyone who uses the GPT spends your daily calls, and the [Terms](/terms#api) do not allow sharing a key. Keep such a GPT for your own use.

## If something goes wrong

- **The sign-in page says "Connecting apps comes with every plan":** the Fundalyze account has no active plan or trial.
- **The connector shows an error after creation:** delete it and create it again, then sign in. Check that the URL is exactly `https://api.fundalyze.ai/mcp`.
- **A quota message:** the connection (or key) has used its 2,000 calls for the day; they reset at 00:00 UTC.

More in [Errors](/developers/concepts/errors).